A nodule of plant material permeated with minerals found mostly in bituminous and anthracite coal seams

One of the smallest birds of the tit family Paridae, Periparus ater, with a black cap, white nape patch and greyish body with buff underparts.

(simile) Completely black.

A mine from which coal ore or coal minerals are mined.

(regional) kerosene or any unspecified lower grade derivative of crude petroleum

Any technology that may mitigate emissions of carbon dioxide and other greenhouse gasses that arise from the burning of coal for electrical power.

plural of coal tit

(geology) A kind of coal, historically found near the surface, which split like shale rock and burned with medium smoke, a yellow flame and a sulfur smell.

(dated) water that is being used to generate power

high-quality coal / (nontechnical) coal